-12.62% is the change from 721 to 630
Calculation steps:
[( 630 - 721 ) ÷ 721] x 100 = -12.62%
Formula
Percentage change = [(630 - 721) / 721] x 100
Subtract the new number by the original number
630 - 721 = -91
-91 ÷ 721 = -0.1262135922330097
-0.1262135922330097 x 100 = -12.62%